UNDERCODE COMMUNITY
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🦑 Undercode Cyber World!
@UndercodeCommunity


1️⃣ World first platform which Collect & Analyzes every New hacking method.
+ AI Pratice
@Undercode_Testing

2️⃣ Cyber & Tech NEWS:
@Undercode_News

3️⃣ CVE @Daily_CVE

Web & Services:
Undercode.help
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Forwarded from Exploiting Crew (Pr1vAt3)
Forwarded from Exploiting Crew (Pr1vAt3)
🦑 Troubleshooting OSPFv2 Neighbor Adjacencies Made Easy! 🛠
Are your OSPFv2 neighbors stuck in states like Init, 2-Way, or ExStart? Troubleshooting OSPF can be tricky, but with the right approach, you can resolve issues quickly! Here's a checklist to help:

1. Check Network Types
Ensure both devices are on the same network type (Broadcast, Point-to-Point, Non-Broadcast, etc.). A mismatch could lead to adjacency issues.
2. Verify Subnet Masks
Neighbors must share the same subnet. Run show ip ospf interface to confirm.
3. Confirm Hello and Dead Timers
Default timers should match. Use show ip ospf neighbor to check compatibility.
4. Authentication Configurations
Is OSPF authentication enabled? Double-check the keys and methods (Plaintext/MD5).
5. MTU Mismatch
A mismatch in MTU can cause neighbors to get stuck in ExStart. Use ip ospf mtu-ignore if necessary.
6. Router IDs
Each router must have a unique Router ID. Conflicts can disrupt adjacencies.
7. Passive Interfaces
Is OSPF accidentally configured as passive on the neighbor-facing interface? Check your configs!
8. Access-Lists or Firewalls
Ensure UDP packets on ports 520 and 89 aren't blocked by ACLs or firewalls.
Troubleshooting OSPF is all about systematic checks and leveraging show/debug commands. Here's my golden rule: Start from Layer 1 and move up!
💡 What’s your go-to step when troubleshooting OSPF adjacencies?

Ref: Sumit Kashyap
@UndercodeCommunity
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Forwarded from Exploiting Crew (Pr1vAt3)
🦑 "Bug Bounty Preparation: Essential HTTP and Networking Resources"

1️⃣HTTP Basics

🧨All in One Resource:
https://www.hacker101.com/sessions/web_in_depth
(Includes: HTTP Basics, Cookie Security, HTML Parsing, MIME Sniffing, Encoding Sniffing, Same-Origin Policy)

HTTP Request Form:
https://www.tutorialspoint.com/http/http_requests.htm

HTTP Response Form:
https://www.tutorialspoint.com/http/http_responses.htm

HTTP Response Codes:
https://www.tutorialspoint.com/http/http_status_codes.htm

HTTP URL Encoding:
https://www.tutorialspoint.com/http/http_url_encoding.htm

🧨HTTP Basics - Video Resources

HTTP Crash Course & Exploration:
https://www.youtube.com/watch?v=iYM2zFP3Zn0

Same-Origin Policy:
https://www.youtube.com/watch?v=bSJm8-zJTzQ

2️⃣Networking Basics
Terminology:
https://www.digitalocean.com/community/tutorials/an-introduction-to-networking-terminology-interfaces-and-protocols

What is an IP?:
https://commotionwireless.net/docs/cck/networking/learn-networking-basics/

What are Ports?:
https://www.utilizewindows.com/list-of-common-network-port-numbers/

What is DNS?:
https://code.tutsplus.com/tutorials/an-introduction-to-learning-and-using-dns-records--cms-24704

@UndercodeCommunity
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